>> brown: and that's the newshour for tonight. on wednesday, the investigation continues into who was behind the boston bombings. i'm jeffrey brown. >> ifill: and i'm gwen ifill. we'll see you online, and again here tomorrow evening. thank you, and good night. >> major funding for the pbs newshour has been provided by: >> bnsf railway. >> macarthur foundation. >> and with the ongoing support of these institutions and foundations. and... >> this program was made possible by the corporation for public broadcasting. and by contributions to your pbs station from viewers like you. thank you. captioning sponsored by macneil/lehrer productions captioned by media access group at wgbh access.wgbh.org >> this is "bbc world news america." funding of this presentation is made possible by the freeman foundation of new york, stowe, vermont, and honolulu, newman's own foundation, giving all profits to charity and pursuing the common good for over 30 years, united healthcare, union bank, and fidelity investments. >> this is what a personal econom